Hi Just this morning my 599 in Auto wouldn't shift to 4th and upwards. Rpm on 3rd stayed on 2.5.. no faults then i pulled over turned it off and started. And it shifted normally for a few minutes and then it stayed on 3rd wouldn't go to 4th. And transmission fault came on. Maybe someone can help me.

 

This is going to require help from dealer or qualified independent shop, I think. Problem sounds software related to me. Either that, or it's a bigger problem. However, I'm not a tech. Check your PM, though.

CW